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vaieri [72.5K]
3 years ago
5

I have 2 questions, they're similar, but i have no idea. can someone please help me.

Mathematics
1 answer:
Dimas [21]3 years ago
5 0

Answer:

First Picture:

\sqrt{x} -3=3-\sqrt{x}\\\\\x-3=0\\  +3  +3\\x=3

Second Picture:

2/3(9x-6)-4=9x-6

(6x-4-4=9x-6\\6x-8=9x-6\\   -9        -9\\\\-3x-8=-6\\      \\+8  +8\\-3x=2\\\\x=-2/3

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Complete the chart to find the mean, variance, and standard deviation. Remember to use commas and round numbers to the nearest t
vitfil [10]

Answer: The mean of the data is 433.75, variance of the data is 99667.19 and the standard deviation of the data is 315.7011.

Explanation:

The given data is 900, 35, 500 and 300.

The number of observation is 4.

Formula of mean is,

\text{Mean}=\frac{\text{Sum of observations}}{\text{Number of observations}}

\bar{X}=\frac{900+35+50+300}{4} =433.75

The formula of variance is given below,

\sigma^2=\frac{1}{n}\sum{(X-\bar{X})^2}

\sigma^2=\frac{398668.75}{4}

\sigma^2=99667.19

The variance of the data is 99667.19

\sigma=\sqrt{99667.19}

\sigma=315.7011

The standard deviation of the data is 315.7011.

The other information or values of given chart is shown in the attached table.

8 0
3 years ago
Read 2 more answers
Let p represent any number in the interval (- 18,22). Rewrite the possible values for p in inequality notation.
Nataliya [291]

Answer:

-18 < p < 22

Step-by-step explanation:

We are given the following information in the question.

The open interval: (- 18,22).

Let p belong to the given interval then p represents all the values belonging to the given interval.

Open Interval: An open interval is a interval that does not include the end points.

Thus, we can write:

-18 < p < 22

is the required inequality form required.

That is p can take values greater than -18 and smaller than 22.

6 0
3 years ago
Hurry a lot of Points!
yulyashka [42]

Answer:

17/20

Step-by-step explanation:

not even that much points but ok lol

5 0
3 years ago
Read 2 more answers
What number raised to the -2 exponent would equal 1/4?
serious [3.7K]
Let, the number = x
It would be: x² = 1/4
x = √1/4
x = 1/2

In short, Your Answer would be 1/2

Hope this helps!

5 0
3 years ago
-2 (m+n-4)+5 (-2m+2n)+n (m+4n-5)
Natalka [10]
So if you want to add
we distribute
a(b+c)=ab+ac so
-2(m+n-4)=-2m-2n+8

5(-2m+2n)=-10m+10n

n(m+4n-5)=mn+4n^2-5n

so total we ahve
-2m-2n+8-10m+10n+mn+4n^2-5n
group like terms
4n^2+-2m-10m-2n+10n-5n+mn+8
add like temrs
4n^2-12m+3n+mn+8
5 0
4 years ago
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